Exchange two-digit values and two-digit values without using a temporary variable

Using temporary variables is very simple

#include <stdio.h>

int main ()

{

int a = 1, b = 2, c = 0;

printf ("a=");

scanf ("%d", &a);

printf ("b=");

scanf ("%d", &b);

c = A;

A = b;

b = C;

printf ("a=%d,b=%d\n", A, b);

System ("pause");

return 0;

}

At this point, I thought I could do the same without adding temporary variables.

The method of adding and reducing can be used

#include <stdio.h>

int main ()

{

int a = 1, b = 2;

printf ("a=");

scanf ("%d", &a);

printf ("b=");

scanf ("%d", &b);

A = a + B;

b = a A;

A = a-B;

printf ("a=%d,b=%d\n", A, b);

System ("pause");

return 0;

}

And the method of XOR

#include <stdio.h>

int main ()

{

int a = 1, b = 2;

printf ("a=");

scanf ("%d", &a);

printf ("b=");

scanf ("%d", &b);

A = a ^ b;//Building a Collection

b = A ^ b;//take out another number in the collection

A = a ^ b;//take out another number in the collection

printf ("a=%d,b=%d\n", A, b);

System ("pause");

return 0;

}

Exchange two-digit values and two-digit values without using a temporary variable